JP7127189B2 - Swivel drive for solar panels - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning agitation drive for a solar panel. The swivel agitator drive comprises a support base, a rotary table, a swivel plate and an agitator shaft. A rotary table is attached to the support and pivots around a substantially vertical first axis. A swivel plate is attached to the rotary table and swivels about a substantially horizontal second axis. An agitator shaft is attached to the pivot plate and pivots about a third axis. The solar panel is attached to the fan shaft so that it can be closed and opened around the third axis.

Solar panels that can be fanned out with this type of drive and adjusted according to the position of the sun are, for example, AT509.886B1, AT512.680B1 and AT513.B1 by the same applicant. 875B1. The solar panels disclosed in these documents are fanned out from a protection position where a plurality of solar panels are stacked almost on top of each other to an opening operation position by rotating the fan shaft on which the solar panels are mounted. It is possible. And vice versa. Therefore, among the plurality of stacked solar panels, the uppermost (or lowermost) solar panel is non-rotatably connected to the fan shaft, and the remaining solar panels are mounted on the fan shaft. is rotatably arranged. Then, during the fan opening operation and the fan closing operation, the dog is used to pull the next solar panel, and the pulled solar panel pulls the next solar panel. In the open fan operating position, the solar panel is aligned with the sun by rotating the rotary table and the rotating plate in the azimuth and elevation directions.

SUMMARY OF THE INVENTION It is an object of the present invention to create a solar panel swivel agitator drive that is simple in construction, space-saving, and less prone to failure than conventional designs.

This object is achieved by the swivel fan drive described in the introduction. According to the invention, the rotary table mounts one end of the pivot plate about the second axis to form a crank rocker linkage, and is spaced therefrom by means of connecting rods. Attach at least one crank that connects to the other end of the plate.

Constructing the crank rocker linkage from a rotary table, swivel plate, crank and connecting rods results in a very compact and space saving design. With this design, the pivot plate can be pivoted to a rest position, eg for protection purposes. The pivot plate can then be positioned above the rotary table, substantially horizontally with the rotary table. For transport purposes, the swivel plate can be swiveled to a substantially vertical end position. In the end position the crank and connecting rod are preferably substantially extended. For example, the forces generated from impacts on the swivel head act on the shaft bearings while not acting on the more sensitive links in the crankshaft. At the same time, very few parts are needed to build the pivot gear for the pivot plate, especially the crank and the connecting rod. This simplifies manufacturing. By using a crank rocker linkage for the pivot plate, very fault tolerant operation can be achieved. This is because the crank can rotate sufficiently so that accidental overspeeding of the motor driving the crank cannot impede or damage the motor or mechanism.

The mounting shaft of the crank is preferably located below the second shaft on the rotary table. By suitably dimensioning the cranks, connecting rods, and effective link distances from the rotary table and swivel plate, this arrangement allows, for example, the swivel plate to move from a horizontal rest position through any tilted position. , to a vertical end position. As a result, solar panels can track the position of the sun.

According to a preferred configuration according to the invention, it is particularly robust when the rotary table comprises two upwardly projecting bearing arms between which the one end of the swivel plate is mounted. A space-saving embodiment is provided. For the same reason, each of the two cranks preferably comprises one connecting rod between which the other end of the pivot plate is mounted.

In an advantageous embodiment, the cranks are arranged on a common shaft, which may be mounted inside bearing tabs of the rotary table. As a result, only one drive is required for two cranks. Here, if the rotary table comprises bearing arms and bearing tabs, the rotary table may be formed in one piece, preferably as a casting. This greatly simplifies the final assembly of the drive during manufacturing.

Although the swivel fan drive according to the invention can be manually actuated, the motor operation preferably provides fully automatic adjustment of the solar panel to the position of the sun and is protected, for example, at night or in the elements. It is designed to make the closing and opening of the solar panel fully automatic so as to move the solar panel to the closed position.

For this purpose, the pivoting movements about the three axes are performed using any known drive. Optional drives are, for example, hydraulic drives, pneumatic drives, electric servomotors, e.g. slow-rotating or decelerating electric motors or stepper motors. Any known gear mechanism such as planetary gear trains and helical gears such as planetary gear trains may be used.

In a preferred embodiment according to the invention, an electric motor with a reduction worm gear is used. That is, the crank is preferably driven by a first electric motor attached to the rotary table through a first worm gear. and/or the rotary table is preferably driven by a second electric motor mounted on the support base via a second worm gear. and/or said agitator shaft is preferably driven by a third electric motor attached to said pivot plate via a third worm gear.

In a further aspect of the invention, instead of using a dedicated third drive for the agitator shaft, one of the other two drives is additionally used for this purpose. By selectively coupling the agitator shaft to the rotary table or a drive of the rotary table, or the pivot plate or a drive of the pivot plate, the solar panel can be azimuthally rotated or pivoted on the rotary table. During elevation pivoting of the plate, it can be fanned open or closed. After the desired opening or closing of the solar panel, the coupling is released again and the drive of the rotary table and the drive of the pivot plate are again used for azimuth elevation adjustment. be done.

It is particularly preferred that the rotary table driving portion is shared with the driving portion of the agitation shaft. That is, the agitator shaft can be driven by the rotary table or a drive of the rotary table via a coupling. And at the same time, the coupling is automatically actuated by the pivoting of the pivot plate. In particular, the coupling is coupled in a rest position of the pivot plate and decoupled in a pivot position of the pivot plate remote from the rest position. For example, the rest position of the pivot plate is the horizontal position of the pivot plate, which is aligned horizontally with the top of the rotary table relative to the rotary table. In this position the couplings are connected. Here, the rotary table drive section is used to open the solar panel. Once the elevation of the solar panel is aligned with the sun by the pivot drive, the coupling is released and the rotary table drive can be used again for azimuth adjustment.

In an advantageous practical form according to the invention, said coupling is formed by a pinion and is driven by said rotary table via a gear shaft and a gear rim located on said agitator shaft, said gear rim being connected to said swivel plate. The pinion is engaged when pivoted toward the rest position and disengaged with the pinion when the pivot plate is pivoted out of the rest position. This automatically engages and disengages the coupling between the rotary table drive and the agitator shaft as the pivot plate pivots.

To prevent accidental rotation of the agitator shaft during operation once the coupling has been decoupled to separate the azimuth and elevation drives, according to a further preferred arrangement of the present invention, the agitator shaft is may be selectively rotationally fixed to the pivot plate via yet another coupling. Said other coupling takes place automatically by pivoting movement of said pivot plate. More specifically, in particular, said other coupling is uncoupled in a rest position of said pivot plate and engages in a pivot position of said pivot plate remote from said rest position. In a preferred embodiment according to this variant, the other coupling for this purpose may be a brake disc rotationally fixed to the agitator shaft, spring-loaded against the braking surface of the pivot plate, The pivot plate is spaced from the braking surface by an actuating member of the rotary table as it pivots toward the rest position. In this way the second coupling is automatically performed in a fault-tolerant manner. It can also be implemented as follows. The other coupling is a spring-loaded brake pinion that is rotationally fixed on the pivot plate and axially movable and has brake teeth for engaging the gear rim. and is biased against the spring catch to disengage when the pivot plate pivots toward the rest position.

The invention will be described in detail below with reference to exemplary embodiments shown in the accompanying drawings.

1 is a schematic perspective view from above of a solar module with fanable solar panels in two different operating positions; FIG. 1 is a schematic perspective view from above of a solar module with fanable solar panels in two different operating positions; FIG. Figure 3 is a detailed perspective view from above of a swivel fan drive according to the invention for use in the solar module shown in Figures 1 and 2 in two different operating positions; Figure 3 is a detailed perspective view from below of a swivel fan drive according to the invention for use in the solar module shown in Figures 1 and 2 in two different operating positions; FIG. 5 is a side view of the turning agitation drive shown in FIGS. 3 and 4; FIG. 5 is a plan view of the turning agitation drive shown in FIGS. 3 and 4; FIG. 5 is a rear view of the turning agitation drive shown in FIGS. 3 and 4; 8 shows cross-sectional views in two different operating positions for two different embodiments of the swivel agitator drive shown in FIGS. 3 to 7; FIG. 8 shows cross-sectional views in two different operating positions for two different embodiments of the swivel agitator drive shown in FIGS. 3 to 7; FIG. 8 shows cross-sectional views in two different operating positions for two different embodiments of the swivel agitator drive shown in FIGS. 3 to 7; FIG. 8 shows cross-sectional views in two different operating positions for two different embodiments of the swivel agitator drive shown in FIGS. 3 to 7; FIG.

1 and 2 show a solar cell module 1 having a plurality of plate-like solar panels 2. FIG. The solar panel 2 is attached to the anchor 4 so that it can be swung and fanned by the swivel fan driving part 3. - 特許庁As a result, the solar panel 2 can be fan-opened from the first fan-closed position (FIG. 1) to the second fan-open position (FIG. 2). The solar panels 2 are stacked on each other and arranged substantially together at the first closed fan position. At the second fan-opening position, the solar panels 2 are fanned about the common fan-opening shaft 5 and move to positions substantially adjacent to each other. The fanned axis 5 is oriented about a first substantially vertical axis 6 using the swivel fan drive 3 to align the fanned solar panel 2 with the sun and track the sun. and adjusted in elevation about a second substantially horizontal axis 7 . The type of the anchor 4 is not limited, and may be, for example, the illustrated pillar type or stand type, or may be a part of a building, a floor anchor, or a part of a ship, automobile, container, or the like.

The solar panel 2 has, for example, the shape of a portion of a ring. The solar panels 2 preferably have a shape with rounded corners (petal-like) as shown and are, but need not be, separated from each other in a fanned position to form a complete ring. Complement each other (Fig. 2). For example, there are twelve solar panels 2 . The parts that make up the loop each have an angle of about 30 degrees. Therefore, the mutual opening angle or turning angle of the adjacent solar panels 2 is about 30 degrees.

Each of the solar panels 2 has a planar array of solar cells 8 on its upper surface side. For example, the solar cell 8 is manufactured by crystalline or organic or thin film technology. For clarity of drawing, the electrical connections and circuits of the solar panel 2 and the solar cell 8 are not shown. For example, the solar panel 2 has contact with the anchor 4 or the swivel agitator drive 3 via a flexible connecting cable or a flexible loop contact and a rigid contact ring, and the solar panel 2 furthermore connect to.

3 to 9 show the swivel fan drive 3 of the solar panel 2 in detail. The turning agitation drive unit 3 has a support base 9 . The support base 9 is in the form of a ring flange and is for example screwed onto the upper end of the anchor 4 by means of a bore 10 . The rotary table 12 is mounted on the support base 9 via ball bearings 11 in such a way that the rotary table is at least pivotable, preferably fully pivotable about the axis 6 .

Rotary table 12 is provided with two bearing arms 14 at one end 13 . The two bearing arms 14 project upward and are spaced apart from each other. Between the two bearing arms 14 one end 15 of a pivot plate 16 is mounted for pivoting about axis 7 . Pivot plate 16 is otherwise pivotably attached to rotary table 12 . For example, pivot plate 16 is attached using hinges. The terms "rotary table" and "swivel plate" do not literally refer to the table or table shape, but to the function of the particular member. For example, the rotary table 12 may have a shape other than a table shape, such as a hub, a shaft connecting member, or a block. The swivel plate 16 may have a shape other than the table shape. For example, pivot plate 16 may be in the form of a hub, shaft connection member, block, or support of any shape.

The agitator shaft 18 is mounted on top of the pivot plate 16 via ball bearings 17 or inside the pivot plate 16 so that the agitator shaft is at least pivotable, preferably completely pivotable about the fanning axis 5 . can be attached to 3 to 9 show only the end of the fan shaft 18 on the drive end side (in the form of a ring flange). Another part of the agitator shaft 18 (visible in FIG. 2) is flange-mounted to said end via a bore 19 to move the solar panel 2 . By rotating the fan shaft 18, the solar panel 2 moves from the closed fan position (FIG. 1) to the open fan position (FIG. 2). The reverse movement is also performed. For this reason, the uppermost end (or the lowermost end) of the plurality of stacked solar panels 2 (FIG. 1) is connected to the fan shaft 18 in a non-rotatable manner, for example. In addition, the lowermost ends (or uppermost ends) of the plurality of stacked solar panels 2 are connected to the swivel plate 16 in a non-rotatable manner. Here, the solar panels 2 are each connected to the adjacent solar panels using a pull rail, pull hook, or dog, etc. during the opening or closing operation until all the solar panels 2 open or close. Pull out the light panel 2.

During this pulling movement, another solar panel 2 slides over a certain solar panel 2 , and this slide can be utilized for cleaning the solar panel 2 . For this purpose, each of the solar panels 2 (except the bottommost solar panel 2) has a sweeper lip on the rear side. The sweeper lip sweeps the corresponding solar panel 2 provided underneath when the solar panel is fanned out. For example, the sweeper lip may be a rubber lip or a brushed lip and may simultaneously form the pull rail.

The pivot plate 16 pivots relative to the rotary table 12 using at least one crank 20 (here two). The cranks 20 are on a common shaft 21 and attached to bearing tabs 22 of the rotary table 12 . More specifically, the crank 20 is aligned with the bearing tabs of the rotary table 12 such that the axis 21 ′ of the shaft 21 remains parallel to and at a distance from the axis 7 of the pivot plate 16 . 22 is attached. A bearing tab 22 is formed at the root of the bearing arm 14 . Alternatively, bearing tabs 22 are formed separate from bearing arms 14 .

The cranks 20 are each connected at the end remote from the shaft 21 to the other end 24 of the pivot plate 16 at a hinge axis 25 by a connecting rod 23 . the other end 24 is opposite end 15;
Four parts constituted by the rotary table 12, the swivel plate 16, the crank 20, and the connecting rod 23 form four rod-shaped link mechanisms. Specifically, for the crank rocker linkage mechanism, the "crank" is formed by the crank 20, the "rocker" is formed by the pivot plate 16, the "chassis" is formed by the rotary table 2, and the "connecting member" is the connecting rod. 23. The chassis length between shaft axis 21' and pivot axis 7, the rocker length between pivot axis 7 and hinge axis 25, and the effective length between crank 20 and connecting rod 23 are known in the art. Determines the kinematics of the crank rocker linkage, as is known. The lengths of each of the above are preferably, but not limited to, such that the pivot plate 16 undergoes a pivotal movement of approximately 90° from a generally horizontal rest position (FIG. 3) to a generally vertical end position (FIG. 4), and It is determined to return when the crank 20 has made a full turn.

Here, the shaft axis 21 ′ of the crank 20 is preferably offset from the pivot axis 7 and positioned below the pivot axis 7 . This ensures that in the rest position (FIG. 3) the pivot plate 16 is positioned substantially parallel to and above the rotary table 12 when the cranks 20 and connecting rods 23 are at their shortest positions. can be located in This results in a very small space requirement in the rest position (FIG. 3). In the fully pivoted end position (FIG. 4), the crank 20 and connecting rod 23 are in their fully extended position.

Movement of the swivel fan drive 3 about one or more axes 5, 6, 7 can in the simplest case be manual. However, movements about one or more of the axes 5, 6, 7 are preferably effected by corresponding drives. For example, hydraulic cylinders, pneumatic cylinders, servo motors, or stepping motors. A first embodiment is shown in FIGS. 3-7. Here, a reduction gear motor drive is provided for each of the three movements.

To this end, a first electric motor 26 with a flange mounted angle gear 27 is mounted on the rotary table 12 and drives the crank 20 or shaft 21 with a first worm gear 28 . The first worm gear 28 comprises, for example, a worm driven by the electric motor 26 using the angle gear 27 . The worm engages inside a worm wheel located on the crank 20 or shaft 21 .

A second electric motor 29 with a flange mounted angle gear 30 is mounted on the support base 9 and drives the rotary table 12 with a second worm gear 31 . The second worm gear 31 includes, for example, a worm that engages inside the worm wheel of the rotary table 12 .

A third electric motor 32 with a flange mounted angle gear 33 is mounted on the pivot plate 16 and drives the agitator shaft 18 with a third worm gear 34 . For example, the third worm gear 34 drives the agitator shaft 18 with a worm engaging inside a worm wheel connected to the agitator shaft 18 .

Other suitable gear mechanisms may be substituted for one or more of the worm gears described above. For example, spur gears, planetary gear trains or oblique gears (e.g. bevel gears, crown gears or planetary oblique gears, etc.) are also used, more particularly those with one or more gear stages in each case. can.

8 and 11 show various variants of the second embodiment of the drive of the fan shaft 18. FIG. Specifically, there is no separate electric drive for this purpose, and the drive of the rotary table 12 is selectively shared for this purpose. To this end, a gear shaft 35 having a substantially vertical axis of rotation is attached to bearings 36 , 37 and/or one bearing tab 22 of the plurality of bearing tabs 22 on the rotary table 12 . Gear shaft 35 has a pinion 38 at its lower end. Pinion 38 engages gear rim 39 . A gear rim 39 is formed on the outer circumference of the flange 40 of the support base 9 . As the rotary table 12 rotates relative to the support 9 or flange 40, the gear shaft 35 rotates.

At its upper end the gear shaft 35 carries another pinion 41 . Pinion 41 engages gear rim 42 in the pivoted down position of pivot plate 16 (FIGS. 8 and 10). A gear rim 42 is formed on the outer circumference of the fan shaft 18 . In this position, the second electric motor 29 drives the rotary table 12 through the engagement of the pinion 41 and gear rim 42 to the agitator shaft 18 . As a result, the solar panel 2 rotates about the axis 6 and at the same time opens or closes about the axis 5 .

The pinion 41 and the gear rim 42 thus provide a connection between the rotary table 12 or the drive of the rotary table 12 and the agitator shaft 18 . This connection is made in the rest position of the pivot plate 16 (FIGS. 8 and 10). When the swivel plate 16 swivels up, this connection is released (see FIGS. 9 and 11). That is, the engagement between the pinion 41 and the gear rim 42 is released. This again allows the electric motor 29 to be used only for the rotation of the rotary drive about the axis 6 (ie the orientation of the solar panel 2).

When the pivot plate 16 is pivoted down to the rest position (FIGS. 8 and 10), or when the pivot plate 16 is pivoted down towards the rest position, the pinion 41 and the gear rim 42 reconnect and the solar panel 2 The electric motor 29 is again enabled for closing the .

If desired, the stacked solar panels 2 are pivoted down to the closed position by rotating about pivot axis 7 . As a result, the solar panel 2 assumes a hanging position as shown in FIG. In this position the solar panel 2 is protected from wind and weather.

It is also understood that, as an alternative to the second electric motor 29 of the rotary table drive, the first electric motor 26 for the pivot plate drive can also be used for the electric drive of the agitator shaft 18 . In this case, the connection between the swivel plate 16 or the drive 26 of the swivel plate 16 and the fan shaft 18 is likewise provided.

Accidental changes to the closed or open position of the solar panel 2 are avoided when the engagement between the pinion 41 and the gear rim 42 is released in a position away from the rest position (FIGS. 8 and 10). Other couplings may be used to temporarily rotationally fix the agitator shaft 18 to the pivot plate 16, particularly during azimuth elevation adjustment of the solar panel 2 . Said other coupling in the variant of FIGS. 8 and 9 comprises a brake disc 45 . A brake disc 45 is non-rotatably connected to the agitator shaft 18 and is spring-loaded against the braking surface 43 of the pivot plate 16 with a spring 44 . As the pivot plate 16 pivots down toward the rest position, the brake disc 45 is lifted off the braking surface 43 by an actuating member 46 mounted on the rotary table 12 (see FIG. 8). As the pivot plate 16 pivots up, the actuating member 46 disengages from the brake disc 45 . As a result, the brake disc is pressed against the brake surface 43 by the spring 44 to rotationally fix the agitator shaft 18 to the pivot plate 16 . Thus, in the rest position of pivot plate 16, the other couplings 43-46 are disengaged. The other couplings 43-46 also take place in a pivoted position away from the rest position.

As an alternative to the brake disc/brake surface design of the couplings 43-46 described above, any coupling that allows the agitator shaft 18 to be temporarily fixed may be used.

For example, according to the variant shown in FIGS. 10 and 11, the braking function of the further coupling is realized by a brake pinion 47 or the like with brake teeth 48, in the position of FIG. is mounted non-rotatably, but axially movably, i.e. longitudinally in FIG. When the pivot plate 16 is pivoted up (FIG. 11), the brake pinion 47 is pressed in a spring-loaded manner to engage the gear rim 42 with the brake teeth 48 and lock said gear rim in rotation. In the rest position of pivot plate 16 (FIG. 10), the brake pinion disengages from gear shaft 35 against the spring bias, thereby releasing gear rim 42 .

It will be appreciated that couplings 41, 42 and couplings 43-49 may also be manually actuated or powered. For example, couplings 41 , 42 and couplings 43 - 49 may be controlled by an electric device that also controls electric motor 26 and electric motor 29 .

The present invention is not limited to the disclosed embodiments, but includes all variations, modifications and combinations falling within the scope of the appended claims.

Claims (20)

A turning agitation drive (3) for a solar panel (2),
a support base (9);
a rotary table (12) mounted on said support (9) to pivot about a vertical axis (6) ;
A pivoting plate (16) on which the solar panel (2) is mounted so as to be able to open and close around the opening axis (5), which pivots around a horizontal axis (7). a pivot plate (16) mounted on the rotary table (12) so as to
at least one crank (20) pivotally mounted on said rotary table (12);
A connecting rod (23), wherein the rotary table (12), the turning plate (16), the crank (20) and the connecting rod (23) form four rod-like link mechanisms, and the crank a first end connected to said crank (20) and connected to said pivot plate (16) such that the pivot movement of (20) pivots said pivot plate (16) about said horizontal axis (7); and a connecting rod (23) having a second end which is a swivel fan drive (3). A swivel agitator drive (3) according to claim 1, wherein said swivel plate (16) is swivelable about said horizontal axis (7) between a horizontal position and a vertical position. Said pivot plate (16) is pivotable about said horizontal axis (7) so that said pivot plate (16) is substantially horizontal with respect to said rotary table (12) and the upper part of said rotary table. and a generally vertical end position in which the crank (20) and the connecting rod (23) are generally extended. A swivel agitator drive (3) according to claim 1 or 2. Said rotary table (12) supports a first end (15) of said swivel plate (16) about said horizontal axis (7), and there 4. A crank according to claim 3, supporting said at least one crank (20) connected to said second end (24) of said pivot plate (16) via said connecting rod (23) at a position spaced from the A swivel agitator drive (3). The rotary table (12) comprises two upwardly projecting bearing arms (14) between which the first end (15) of the pivot plate (16) is mounted. 5. A swivel agitator drive (3) according to claim 4, wherein a two cranks (20) each comprising a connecting rod (23) between which said second end (24) of said pivot plate (16) is mounted; A swivel agitator drive (3) according to claim 4 or 5. Said cranks (20) are arranged on a common shaft (21), said common shaft (21) is mounted inside bearing tabs (22) of said rotary table (12), said shaft (21) ) is arranged preferably parallel to and at a distance from said horizontal axis (7). (3). 8. Any one of claims 1 to 7, wherein the rotary table (12) is manufactured integrally with the bearing arms (14) and bearing tabs (22), if present, preferably as a casting. A swivel agitator drive (3) according to 1. The mounting shaft (21') of the crank (20) according to any one of claims 1 to 8, wherein the mounting shaft (21') of the crank (20) is positioned below the horizontal shaft (7) on the rotary table (12). slewing agitator drive (3). Said crank (20) is driven by a first drive, such as a first electric motor (26, 27) mounted on said rotary table (12) through a first gear, such as a first worm gear (28). A swivel agitator drive (3) according to any one of claims 1 to 9, driven. Swivel fan drive (3) according to any one of the preceding claims, wherein said rotary table (12) is mounted so as to be able to swivel completely around said vertical axis (6). Said rotary table (12) has a second drive, such as a second electric motor (29, 30) mounted on said support (9) via a second gear, such as a second worm gear (31). 12. The swirling agitator drive (3) according to claim 11, driven by a. 13. Any of claims 1 to 12, further comprising an agitator shaft (18) mounted on said pivot plate (16) for pivoting about said fanning axis (5) relative to said pivot plate (16). A turning agitation drive (3) according to item 1. further comprising a plurality of solar panels (2) mounted on said fan shaft (18), at least one of said plurality of solar panels (2) being operable with said fan shaft (18); 14. A swivel agitator drive (3) according to claim 13, wherein a. Said agitator shaft (18) has a third drive, such as a third electric motor (32, 33) attached to said pivot plate (16) through a third gear, such as a third worm gear (34). 15. The swivel fan drive (3) according to claim 13 or 14, driven by a. 15. Swivel according to claim 13 or 14, wherein the agitator shaft (18) is drivable via a coupling by the swivel plate (16) or by a drive (26-28) of the swivel plate (16). A fan drive (3). The agitator shaft (18) is drivable by the rotary table (12) or a drive section (29-31) of the rotary table (12) through couplings (41, 42). 15. A swivel agitator drive (3) according to 13 or 14. 18. The swivel agitator drive (3) according to claim 17, wherein said couplings (41, 42) are arranged to be actuated by swiveling of said swivel plate (16). 19. According to claim 18, wherein the couplings (41, 42) are coupled in a rest position of the pivot plate (16) and are uncoupled in a pivot position of the pivot plate (16) remote from the rest position. A swivel agitator drive (3) as described. Said couplings (41, 42) are formed by pinions (41) and driven by said rotary table (12) via a gear shaft (35) and a gear rim (42) located on said agitator shaft (18). and said gear rim (42) engages said pinion (41) when said pivot plate (16) pivots to said rest position, and said pinion when said pivot plate (16) pivots from said rest position. 20. Swivel fan drive (3) according to claim 19, wherein the swivel fan drive (3) is disengaged from (41).

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